Book Image

Dancing with Python

By : Robert S. Sutor
Book Image

Dancing with Python

By: Robert S. Sutor

Overview of this book

Dancing with Python helps you learn Python and quantum computing in a practical way. It will help you explore how to work with numbers, strings, collections, iterators, and files. The book goes beyond functions and classes and teaches you to use Python and Qiskit to create gates and circuits for classical and quantum computing. Learn how quantum extends traditional techniques using the Grover Search Algorithm and the code that implements it. Dive into some advanced and widely used applications of Python and revisit strings with more sophisticated tools, such as regular expressions and basic natural language processing (NLP). The final chapters introduce you to data analysis, visualizations, and supervised and unsupervised machine learning. By the end of the book, you will be proficient in programming the latest and most powerful quantum computers, the Pythonic way.
Table of Contents (29 chapters)
2
Part I: Getting to Know Python
10
PART II: Algorithms and Circuits
14
PART III: Advanced Features and Libraries
19
References
20
Other Books You May Enjoy
Appendices
Appendix C: The Complete UniPoly Class
Appendix D: The Complete Guitar Class Hierarchy
Appendix F: Production Notes

4.4 Creating strings

We’ve now seen many examples where we have entered literal strings between single, double, or triple quotes. Let’s look at additional methods to construct strings. You always create new strings and you cannot modify the originals.

letters = "abcd"
letters + "efg"
'abcdefg'
letters
'abcd'
letters += "efg"
letters
'abcdefg'

The “+” operator concatenates two strings. “Concatenate” is a fancy word meaning “stick them together, one after the other.” You can assign the new value to the variable or use operator assignment, as I did here.

String concatenation is very powerful, allowing you to mix text with other strings and other data types.

brands = [
    "Fender",
    "Gibson",
    "Ibanez"
    ]
"I own "...